Radioactive definition, of, pertaining to, exhibiting, or caused by radioactivity. See more.
Endorsement of this paper by Dr. Rosalie Bertell, who has a doctorate degree in Biometry, the design of epidemiological research and the mathematical analysis of
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More precisely, the definition is, according to the current si brochure the second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.
Revision Questions - Radioactivity - Isotopes - Alpha - Beta - Gamma - Half-life - Carbon Dating - Cancer - Safety - Fission - Nuclear Power
The following are the durations of a few common events in seconds.